Lchstzo baxter smith



L.v B. SMITH. LOCK SEAM FOR PIPE SECTIONS.

`APPLICATION FIL'ED NOV. I7. l9l9.

1,356,022, Patented Oct. 19, 1920.

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www, i 23.67;?272/1 UNITED STATESiPATENT OFFICE.

LONZO BAXTER SMITH, OF RICWOOD, WEST VIRGINIA.

Loox-saam ron PIPE-SECTIONS.

To all whom t may concern.'

Be it known that I, LoNzo'BAxfimi va citizen of the United States, residing 'at Richwood, inthe county of Nicholas and State of West Virginia, have invented cer tain new and useful Improvements in Lock- Seams for Pipe-Sections; and I do declare me following to be a full, clear, and exact description of the invention, such aswill en able others skilled in the `art to which it appertains to make and use the same.

This invention relates to improvements in pipes broadly,` 'and it has more particular referenceto a novel lock seam for pipe sections.

The primary object of the invention is to generally improve upon devices of the above Specification of Letters Latent.

named class and to provide a simple and practical lock seam for pipe sections which is extremely easy to make .use of and is very effective and reliable in use. L

With the above and other'objects in view,`

tures of construction, and the combination and arrangement of parts as will be more fully described and claimed.

lthe invention consists of certain novel fea- I attain these objects by constructing the 4lock as illustrated in the accompanying drawings, in which- Figure 1, is an elevation showing the preferred disposition o f the locking devices;

Fig. 2, is a transverse section of the channel and opposite edge about to be inserted.;

' Patented oct. 19, 1920.

applicati@ sied November 1i',v i919. serial No. 338,446.

tecting plate v5 for a locking tongue to be described. The intermediate wall 3 is slit, and the metal between the slit and the adj acent'edge of the sheet Iof metal, is stamped toward the inner wall to form a locking tongue 6, said tongue being received in and spaced slightly from the bottom of a recess 7 which is formed in the inner wall 2. The

free edge of the wall 2 projects beyond the adjacent wall edge to provide a convenient means for guiding into the channel, the 0pposite edge of the -metal sheet.

The metal adjacent the opposite edge of -the pipe section l is slotted at 8 to provide a shoulder 9 which takes over the locking tongue 6 when the edge is inserted in saidv channel as illustrated in Fig. 3. The metal forming the edge oppositethe` shoulder is stamped inwardly to form a ton e 10 adapted to be received with the locking tongue 6 in the recess 7 when the parts are in-locked position. y

It is understood that :these pipe -sections are shipped in knock-down form and when lthey are to be -used the edges are brought together as shown in Fig. 2 and the slotted Vedge is inserted in the adjacent channel, the

locking tongue or tongues 6 and the opposing shoulders being autmaticall locked to- F ig. 3, is a sectional view showing the' edges in locked position; and f Fig. 4, is a section taken on the line of Fig. 2.

Similar reference numerals designate similar parts throughout the several views.

Reference is now had to the drawings 1n which is shown a stove-pipe section 1 formed.

of a single sheet of metal having its edges 1 'brought together and locked, the locking deyvices being provided from one end to a point i approximately midway the length of the pipe section. The remainder of the pipe edges are free to move relatively and provide means for readily inserting the end into another pipe section.`

In providing a reliable locking connection between the longitudinal edges of the sheet of metal, one edge is bent upon itself twice, forming three walls, the inner and intermediate walls 2 and 3 respectively being spaced apart to provide a channel. The outer wall el may or may not be spaced from the intermediate wall 3 and provides a cover or progether as clearly illustrated in ig. 3.

From the foregoing description taken in connection with the accompanying drawing, the construction and operation of the invention will be readily'understood without ,requiring a more extended explanation.

Various changes in the form, proportion and minor details of construction may be.

. having 'a 'series of depressions formed therein, the other overlapping edge having a series of slots through which said tongues extend, one edge of the slots being depressed,

forming other tongues against which the iirst tongues bear, said tongues being receivable in the aforesaid depressions.

In testimony whereof I have hereunto Yset my hand. f

LONZO BAXTERSMITH.

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